Production and characterization of collagenase by Penicillium sp. UCP 1286 isolated from Caatinga soil

A new Penicillium sp. strain isolated from the soil of Caatinga, a Brazilian Biome (UCP 1286) was selected for collagenase production. Fermentation system allowing obtention of collagenolytic activity about 2.7 times higher than existing data, with the highest values of collagenolytic and specific activity (379.80 U/mL, 1460.77 U/mg, respectively), after 126 hours. Applying a factorial design, enzyme production was increased by about 65% compared to the preliminary results. The factorial design demonstrated the existence of two factors with statistical significance on the production of the enzyme: pH and temperature, both with negative effects. Enzyme was found to be more active at pH 9.0 and 37 °C, and also to be very stable in comparison with the collagenase produced by other microorganisms. The enzyme seems to belong to collagenolytic serine proteases family. Concerning the substrate specificity, it was observed that the highest enzyme activity corresponds to azocoll, there was no relevant activity on azocasein and the enzyme showed to be more specific to type V collagen and gelatin than the commercial colagenase produced by Clostridium histolyticum. Major band observed at electrophoresis was approximately 37 kDa. Zymogram analysis confirmed the collagenolytic activity. All data indicates this enzyme as promising biotechnology product.This work was supported by Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco (FACEPE) (IBPG-0137-2.08/12) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq). Sara Silvério also acknowledges her post-doc grant (SFRH/BPD/88584/2012) from FCT (Fundação para a Ciência e a Tecnologia), Portugal

Frequency of HLA B*5701 allele carriers in abacavir treated-HIV infected patients and controls from northeastern Brazil

n our study population from Northeastern Brazil, the frequency of HLA-B*5701 was between Caucasian and African ethnic groups; however, when stratifying for ethnicity, our findings show that the HLA B*5701 carriers' frequencies are more similar to those previously reported for Caucasians and Africans. Considering the clinical importance of hypersensitivity to Abacavir treatment in HIV-infected patients and the frequency of HLA B*5701 carriers reported in this study (3.1% in patients and 3.4% in the controls), we suggest the preventive use of HLA B*5701 testing in clinical practice in Abacavir treatment in Northeastern Brazil

Quality Attributes of Cupuaçu Juice in Response to Treatment with Crude Enzyme Extract Produced by Aspergillus japonicus 586

Cupuaçu (Theobroma grandiflorum Schum) is an Amazonian Basin native fruit whose fruit pulp is consumed as a juice which presents high density, viscosity, and turbidity. Pectic enzymes, usually yielded by microorganisms, are used to reduce the juice viscosity and turbidity. The present study aims to evaluate the use of pectic enzymes when processing cupuaçu juice. The cupuaçu juice was obtained by using Aspergillus japonicus 586 crude enzyme extract and incubation at 50°C with agitation (140 rpm) for one hour. Enzyme activities were determined, and the juices were evaluated as to their yield, turbidity, viscosity, and chemical composition. The juice produced by using crude enzyme extract presented higher soluble solids, reducing sugars, and lower viscosity and turbidity

A ECONOMIA POLÍTICA DA CONVERSIBILIDADE DO REAL: UMA CRÍTICA A ARIDA

This paper aims at discussing critically Pérsio Arida's proposal of adopting full currency convertibility in Brazil. Arida (2003a, 2003b, 2004) points out that currency convertibility would make for lower domestic interest rates in Brazil, as well as for lower interest rates for the Brazilian external bonds. Besides, currency convertibility would stabilize capital flows, as well as exchange rate volatility in Brazil. We argue in this paper that this proposal does not lead necessarily either to less exchange rate volatility, or to lower interest rates. Finally, we close the paper by presenting some alternatives in terms of capital controls in Brazil.

Putative biomarkers for cervical cancer: SNVs, methylation and expression profiles

Cervical cancer is primarily caused by Human papillomavirus (HPV) infection, but other factors such as smoking habits, co-infections and genetic background, can also contribute to its development. Although this cancer is avoidable, it is the fourth most frequent type of cancer in females worldwide and can only be treated with chemotherapy and radical surgery. There is a need for biomarkers that will enable early diagnosis and targeted therapy for this type of cancer. Therefore, a systems biology pipeline was applied in order to identify potential biomarkers for cervical cancer, which show significant reports in three molecular aspects: DNA sequence variants, DNA methylation pattern and alterations in mRNA/protein expression levels. CDH1, CDKN2A, RB1 and TP53 genes were selected as putative biomarkers, being involved in metastasis, cell cycle regulation and tumour suppression. The other ten genes (CDH13, FHIT, PTEN, MLH1, TP73, CDKN1A, CACNA2D2, TERT, WIF1, APC) seemed to play a role in cervical cancer, but the lack of studies prevented their inclusion as possible biomarkers. Our results highlight the importance of these genes. However, further studies should be performed to elucidate the impact of DNA sequence variants and/or epigenetic deregulation and altered expression of these genes in cervical carcinogenesis and their potential as biomarkers for cervical cancer diagnosis and prognosis.This work was funded by the Foundation for Science and Technology of the state of Pernambuco (FACEPE). The authors are grateful to Vinicius Albertin Tigre da Costa for his contributions to the construction of the figures.info:eu-repo/semantics/publishedVersio

Uma avaliação crítica da proposta de conversibilidade plena do real

This paper aims at discussing critically Pérsio Arida’s proposal of adopting currency convertibility in Brazil. Arida (2003a, 2003b, 2004) points out that currency convertibility would make for lower interest rates in Brazil, as well as for lower interest rates for the Brazilian external bonds. Besides, currency convertibility would stabilize capital flows, as well as exchange rate volatility in Brazil. We argue in this paper that this proposal does not lead necessarily either to less exchange rate volatility, or to lower interest rates. Besides, we close the paper by presenting some alternatives to capital controls in Brazil.financial liberalization; convertibility; Brazilian economy; Brazil